<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html class="reftest-print">
<style type="text/css">
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

.float {
  float: right;
  width: 15px;
  background: aqua;
  height: 5in;
}
.L {
  float: left;
}

.container {
  width: 100%;
}

.clear {
  border-bottom: solid orange;
  background: red;
}
</style>

<div class="container">
  <div class="float L"></div>
  <div class="float R"></div>
  <br clear="all">
</div>
<div class="clear">
</div>
